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MashupException.Error: an error occurred during the pre-login handshake
Hi guys, I keep receiving an error while fetching data with a Dataflow Gen2. I am trying to get data through our Gateway (version 3000.178.9) but keep hitting the same error over and over. I tr...
Hi! Has anyone found a solution to this problem? I'm having the same pre-login handshake error for all my Gen2 Dataflows. Gen1 Dataflows work fine. Whether I'm using a lakehouse or a warehouse as the destination, the same thing happens. I've tried many ways to fix this, but to no avail. I opened a support ticket, and they didn't offer any solution. Their response is that it's network glitches. :S
SidJayMicrosoft Employee
If you're using a Gateway could you please verify that port 1433 is open.
More details:
On-premises data gateway considerations for data destinations in Dataflow Gen2 - Microsoft Fabric | Microsoft LearnThanks